﻿#app{
    display: flex;
    height: 100%;
    width: 100%;
}

.left {
    width: 220px;
    background-color: #b6ff00
}

    .left ul li a {
        height: 30px;
        text-align: center;
        display: inline-block;
        width: 100%;
        height: 30px;
        cursor: pointer;
        user-select: none;
        background-color: red;
    }

.content {
    flex: 1;
    background-color: yellow;
}
